JavaScript 按字符串中的数字排序

Question

How could i sort eg an array like this one:

[
  '<@520968882077433856> is level **7,64** _(18115.5 total xp)_',
  '<@289037609274048513> is level **7,07** _(14473 total xp)_',
  '<@672835870080106509> is level **8,25** _(22473.5 total xp)_',
  '<@536686935134175254> is level **6,22** _(10184.5 total xp)_',
]

I would like to sort it by the amount of total xp, so the number within the brackets.

Answer 1

You can use the sort callback. Extract the number with a regular expression:

 const data = [ '<@520968882077433856> is level **7,64** _(18115.5 total xp)_', '<@289037609274048513> is level **7,07** _(14473 total xp)_', '<@672835870080106509> is level **8,25** _(22473.5 total xp)_', '<@536686935134175254> is level **6,22** _(10184.5 total xp)_', ]; const regex = /(?<=_\()[\d.]+/; data.sort((a, b) => +a.match(regex) - +b.match(regex)); console.log(data);

The + is used to convert the returned array (with one match element) to a string and then that to a number. You could use ?.[0] to actually get that first array element.

Answer 2

We can try sorting using a custom lambda expression:

 var input = [ '<@520968882077433856> is level **7,64** _(18115.5 total xp)_', '<@289037609274048513> is level **7,07** _(14473 total xp)_', '<@672835870080106509> is level **8,25** _(22473.5 total xp)_', '<@536686935134175254> is level **6,22** _(10184.5 total xp)_', ]; var output = input.sort( (a, b) => parseFloat(a.match(/(\d+(?:\.\d+)?) total xp\b/)[1]) - parseFloat(b.match(/(\d+(?:\.\d+)?) total xp\b/)[1])); console.log(output);

In the above we are extracting the number which is followed by total xp , parsing it as a float, and then using that value in the sorting comparator. If you want descending order, then just reverse the inequality in the lambda function.

Answer 3

Here is another try, looking for a space after the number:

 const arr=[ '<@520968882077433856> is level **7,64** _(18115.5 total xp)_', '<@289037609274048513> is level **7,07** _(14473 total xp)_', '<@672835870080106509> is level **8,25** _(22473.5 total xp)_', '<@536686935134175254> is level **6,22** _(10184.5 total xp)_', ]; function getN(s){ return s.match(/_\((.+?) /)[1]; } arr.sort((a,b)=>getN(a)-getN(b)) console.log(arr)

Answer 4

Please try this.

 const array = [ "<@520968882077433856> is level **7,64** _(18115.5 total xp)_", "<@289037609274048513> is level **7,07** _(14473 total xp)_", "<@672835870080106509> is level **8,25** _(22473.5 total xp)_", "<@536686935134175254> is level **6,22** _(10184.5 total xp)_", ]; const extractDigitNumber = (string) => { return string.match(/(?<=\_\()(.*?)(?=\)\_)/)[0].replace(/[^\d\.]+/g, '') } array.sort((a, b) => { return extractDigitNumber(a) - extractDigitNumber(b) }) console.log(array)

Answer 5

Details are commented in example

 let data = [ '<@520968882077433856> is level **7,64** _(18115.5 total xp)_', '<@289037609274048513> is level **7,07** _(14473 total xp)_', '<@672835870080106509> is level **8,25** _(22473.5 total xp)_', '<@536686935134175254> is level **6,22** _(10184.5 total xp)_', ] /* * -.map() through array * - on every iteration run.match() using this regex: * /(\d+\.?\d*)(?=\stotal)/ which means: "match one or more numbers, then a possible dot, and then possible numbers, but only if it's followed by a space and literal 'total'" * - return a match in an array and the current index * -.sort() the sub-arrays by their first index (sub[0]) */ let indices = data.map((str, idx) => [+str.match(/(\d+\.?\d*)(?=\stotal)/g), idx]).sort((a, b) => a[0] - b[0]); console.log(JSON.stringify(indices)); //Define an empty array let result = []; /* * - run new array of arrays with.forEach() * - get the string within the original array (data) by the current sub-array's second index (sub[1]) * - push the value into the empty array (result) */ indices.forEach((sub, idx) => result.push(data[sub[1]])); console.log(result);